bibliography

sofia t 18/5/11
internet pages:
http://www.monroecounty.gov/Image/LESSON14.pdf

http://www.id2.ca/downloads/eco-design-paper-facts.pdf

http://www.recyclingforcharities.com/blog/?p=61
http://365daysoftrash.blogspot.com/

http://www.wastenotproject.org/reducewaste_school.html

http://www.uco.es/servicios/dgppa/sepa/educacion/papel.html

http://www.buenastareas.com/ensayos/Impacto-Economico-y-Ambiental-De-La/1781328.html
http://www.monroecounty.gov/Image/LESSON14.pdf

Sofia Botero, 18-5-11

encyclopedias:
the world encyclopedia
what you need to know encyclopedia
ecology encyclopedia
visual encyclopedia of the world

books:
earth matters
nature